The UV Pure 18-30106 - Upstream UV Water Filter System has a flow rate of 15 gallons per minute and utilizes ultraviolet technology to sterilized bacteria and viruses in water. This commercial UV system offers quick bulb changes, a self-cleaning mechanism, and automatic purge valve that eliminates quartz fouling. The Upstream UV system also features a digital display that monitors lamp output and life, troubleshoots problems, and notifies you when the UV bulb needs to be replaced.